<template>
	<view>
		<view class="login-container">
			<!-- 提示登录的图标 -->
			<uni-icons type="contact-filled" size="100" color="#afafaf"></uni-icons>
			<!-- 登录的按钮 -->
			<button type="primary" class="btn-login" @click="getUserInfo">一键登录</button>
			<!-- 登录提示 -->
			<view class="tips-text">登陆后尽享更多权益</view>
		</view>
	</view>
</template>

<script>
	import {
		mapMutations,mapState
	} from 'vuex'
	export default {
		name: "my-login",
		computed:{
			...mapState('m_user',['redirectInfo'])
		},
		data() {
			return {

			};
		},
		methods: {
			...mapMutations('m_user', ['updateUserInfo','updateToken','updateRedirectInfo']),
			getUserInfo() {
				uni.getUserProfile({
					desc: '用于完善会员资料',
					success: (res) => {
						this.updateUserInfo(res.userInfo)
						//获取登录成功之后的Token字符串
						this.getToken(res)
					},
					fail: (res) => {
						return uni.$showMsg('您取消了登录授权！')
					}
				})
			},
			//调用接口换取永久的Token
			async getToken(info) {
				//调用微信登录接口
				const [err, res] = await uni.login().catch(err => err)
				if (err || res.errMsg !== 'login:ok') return uni.$showMsg('登陆失败！')
				//准备参数对象
				const query = {
					code: res.code,
					encryptedData: info.encryptedData,
					iv: info.iv,
					rawData: info.rawData,
					signature: info.signature
				}
				//换取token,但是接口用不了，先用假数据模拟
				// const {data: loginResult} = await uni.$http.post('/api/public/v1/users/wxlogin',query)
				const jsonResult = '{"message":{"user_id":23,"user_email_code":null,"is_active":null,"user_sex":"男","user_qq":"","user_tel":"","user_xueli":"本科","user_hobby":"","user_introduce":null,"create_time":1562221487,"update_time":1562221487,"token":"Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1aWQiOjIzLCJpYXQiOjE1NjQ3MzAwNzksImV4cCI6MTAwMTU2NDczMDA3OH0.YPt-XeLnjV-_1ITaXGY2FhxmCe4NvXuRnRB8OMCfnPo"},"meta":{"msg":"登录成功","status":200}}'
				const loginResult = JSON.parse(jsonResult)
				if (loginResult.meta.status !== 200) return uni.$showMsg('登录失败！')
				this.updateToken(loginResult.message.token)
				this.navigateBack()
			},
			//返回登录之前的页面
			navigateBack(){
				//redirectInfo 不为 null，并且导航方式为 switchTab
				if(this.redirectInfo && this.redirectInfo.openType === 'switchTab'){
					uni.switchTab({
						url:this.redirectInfo.from,
						//导航成功之后，把vuex中的redirectInfo对象重置为null
						complete: () => {
							this.updateRedirectInfo(null)
						}
					})
				}
			}
		}
	}
</script>

<style lang="scss">
	.login-container {
		// 登陆盒子样式
		height: 750rpx;
		display: flex;
		flex-direction: column;
		align-items: center;
		justify-content: center;
		background-color: #f8f8f8;
		position: relative;
		overflow: hidden;

		//绘制登陆盒子底部的半椭圆造型
		&::after {
			content: ' ';
			display: block;
			position: absolute;
			width: 100%;
			height: 40px;
			left: 0;
			bottom: 0;
			background-color: white;
			border-radius: 100%;
			transform: translateY(50%);
		}

		//登录按钮的样式
		.btn-login {
			width: 90%;
			border-radius: 100px;
			margin: 15px 0;
			background-color: #c00000;
		}

		//按钮下方提示消息的样式
		.tips-text {
			font-size: 16px;
			color: gray;
		}

	}
</style>
